How can I mask some mesh objects in Rhino 5 ?

I have a lot of mesh objects. I want to operate some of them, which means that I'd better mask the others in the same time. But I'm a green hand that I don't know how to mask mesh objects.

I used to mesh models with Hypermesh, in which there is function called "component". I can put everything (e.g. geometry, mesh, etc) into a "component". When I need to mask something, I just need to mask the "component". It's quite nice. I want to know if there is such a function or some thing like this in Rhino or in Grasshopper ?

Is there any one who can help me ? Thanks very much.